Don't think we have this one, and it's definetly common enough to be tropeable. Up For Graps
If you ask a person to draw a bomb, this is probably what you get. A round black object, about the size of a bowling ball with a fuse sticking out of it. Sometimes it may have the word "Bomb" written on it in bold letters. Very common in cartoons and comic books. No idea where this comes from, as real-life bombs generally aren't large black spheres.
Seen It a Million Times
, some examples I can remember: